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Mon, 8 Jun 2026 05:37:54 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 8 Jun 2026 05:37:54 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Juergen Christ Cc: linux-s390@vger.kernel.org Subject: [PATCH v2 1/8] s390/purgatory: Enforce z10 minimum architecture level Date: Mon, 8 Jun 2026 07:37:47 +0200 Message-ID: <20260608053754.571282-2-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260608053754.571282-1-hca@linux.ibm.com> References: <20260608053754.571282-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: ZRh5ls2xA0jQRMDGN5Axtqq28wu7FIeV X-Proofpoint-GUID: ZRh5ls2xA0jQRMDGN5Axtqq28wu7FIeV X-Authority-Analysis: v=2.4 cv=ZbEt8MVA c=1 sm=1 tr=0 ts=6a265537 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=foj3guEW7u1rp_cjtnkA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjA4MDA0OSBTYWx0ZWRfX5m/fIQ2siqqU wVaedUgq53Gc6Cg2JONDSsFIIU0d8h8r1tnB7HKqnJt4YdwFmrAINXhVcaK+XpBnb/fgyu/TxFL HeHilUeuT5hs/3/jVtx/l0EssVCUv1058ulonL1Wp8ZqMYXlBcLQQTuzFRyIkxIqDDo+Gm90kOD E6O/86gEJZ9paA0lc5nxyb0xOm1OsF/QjFsIgsCHoizvLMSJBs08kk9adBZKPCtJzBM6og2vcL6 eKicskLfIfxlLGQeL41BKLy1BRTF1vi5hRhcfCq/gJyQczfS5wyuIGgFtAt3BwzS0EZYMUPnoUx c5c9bby/EIgQWFsuGbLku8bmkP3Iu7ACZmW5iDx9q5PxsjhZnbj3vzmcqI55KbIBhBF/qpXsPMg wBf54JLDhgwZH2jxzRPZUSU+cw7oMWrymCxmifxban4SqpB8tkq3ssW+L3kLajhUlrXKhMv3D83 qaJG/gIq2E3TqQq6D2w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-08_01,2026-06-05_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606080049 The purgatory code is compiled without the -march option. This means the default architecture level of the compiler is used. This can cause problems, e.g. if instructions used in inline assemblies are for a higher architecture level than the default architecture level of the compiler. Use z10 as minimum architecture level, similar to the boot code, to enforce a defined architecture level set. Signed-off-by: Heiko Carstens --- arch/s390/purgatory/Makefile | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile index 95a8ac45b67e..f55764d0c49e 100644 --- a/arch/s390/purgatory/Makefile +++ b/arch/s390/purgatory/Makefile @@ -13,18 +13,20 @@ CFLAGS_sha256.o := -D__NO_FORTIFY $(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE $(call if_changed_rule,as_o_S) +CC_FLAGS_MARCH_MINIMUM := -march=z10 + KBUILD_CFLAGS := $(CC_FLAGS_DIALECT) -fno-strict-aliasing -Wall -Wstrict-prototypes KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common KBUILD_CFLAGS += -fno-stack-protector KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -KBUILD_CFLAGS += -D__DISABLE_EXPORTS +KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS KBUILD_CFLAGS += $(CLANG_FLAGS) KBUILD_CFLAGS += $(call cc-option,-fno-PIE) KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe) KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) -KBUILD_AFLAGS += -D__DISABLE_EXPORTS +KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS # Since we link purgatory with -r unresolved symbols are not checked, so we # also link a purgatory.chk binary without -r to check for unresolved symbols. -- 2.53.0